---
title: Address Validation App for Shopify
description: Catch a bad shipping address before it costs you a reship fee. Every order checked against carrier and postal data the moment it lands. Never holds up the sale.
canonical: https://tacey.app/address-validation
---
# Address Validation App for Shopify

A wrong shipping address is not a $5 problem: UPS publishes $21.40 and FedEx $25.50 for an address correction on a package already in transit, before the reship, the refund, or the support ticket. Tacey checks every address the moment an order comes in, says exactly what it found, and never holds up the sale to do it.

## The checking ladder: the cheapest step that can answer, answers

1. **Region check**: is this a country the merchant asked to check at all.
2. **Postal records**: United States and Canada. Most orders end here, confirmed.
3. **Postal-grade check**: Mexico and around 40 more countries, same confirmation.
4. **Placed on the map**: everywhere else. The address can be placed, and Tacey says so rather than certifying it.

If any step fails or times out, the order still goes through. Address validation never blocks checkout. That is a rule on every order, on every plan, not a best effort.

## Three coverage tiers, always labeled

- **Full**, United States, Canada, Mexico: postal-grade confirmation down to the apartment number, the ZIP+4, and the carrier route.
- **Verified**, about 40 more countries, including the UK, Germany, France, Australia, Japan and most of the EU: a full confirmation the address exists and matches, without the US-specific postal extras.
- **Located**, roughly 155 more countries: the address resolves to a real place, not certified the way the first two tiers are, and Tacey says so every time.

## "Valid address" is about fifteen questions, not one

Beyond "is this a real address", the check also asks: does the postal service deliver to this exact door, is the building right but the unit missing, has anyone collected post here recently, can the carrier physically reach the door, is there anywhere safe to leave a parcel, does post arrive there every day, does post go to a shared drop point, is it a PO box (deliverable, just flagged), is it a mailbox shop (not counted against the address), and is it a rural delivery route (accounted for, not penalized).

## Five honest states an order can land in

- **Checked**: A confirmed match, a small fix like a missing apartment number, a suggested correction, or rarely an address that does not look deliverable at all. Each gets its own plain label, never one blanket "verified."
- **Not checked · region off**: The merchant turned off checking for this country. The order still goes through, exactly as if checking were not installed.
- **Not checked · country not covered**: A real coverage gap, not a mistake on the order.
- **Not checked · checker unavailable**: A timeout, an outage, or a rate limit on Tacey's side or a vendor's. The order still went through: the fail-open promise, made visible on the order itself.
- **Not checked · over plan limit**: The order still processes and the customer can still edit it. A check was simply not spent on an order past the plan's cap.

An address is never marked verified unless somebody actually checked it: the dangerous outcome in this category is not "we could not check it", it is a tool that says "verified" when nobody looked.

## FAQ

### Does checking an address slow down checkout?

No. Checking happens after the order is placed, never during checkout, and it never holds up a sale.

### Which countries can you actually verify?

Full postal verification in the US, Canada and Mexico. A full confirmation in about 40 more countries. Everywhere else, the address can be placed as a real location, clearly labeled as a lower tier than the first two.

### What happens if my plan's order limit is reached mid-month?

Nothing breaks. Orders keep flowing and customers can still edit them. Address checking pauses for orders past the plan's allowance, with advance notice on the dashboard and billing page.